 /* 1.样式重置 */
html,body,ul,li,img,a,p,form,input{
    padding: 0;
    margin:0;
    box-sizing: border-box;
} 
body {
    font-family: "微软雅黑",sans-serif;
    font-size: 12px;
}
a,a:hover{
    color: bisque;
    text-decoration: none;
}
ul {
    list-style: none;
}
input {
    outline: none;
    border: none;
    border: 1px solid #ccc;
}
/* 2.添加新样式  */
.f-left {
    float: left;
}
.f-right {
    float: right;
}
.clearfix::before,
.clearfix::after{
    content: "";
    display: block;
    height: 0;
    line-height: 0px;
    clear: both;
    visibility: hidden;
}